Davis estimated he had been called on to bunt once in six years.
戴维斯估计六年来就要求他进行了一次短打。
They typically appear about once in a decade.
它们通常大概每十年出现一次。
"The honourable member does not like me," he observed once in Parliament.
“这位可敬的议员不喜欢我。”他曾经在议会上观察说。
All jazz lovers should come to the Montreal International Jazz Festival at least once in a lifetime.
所有的爵士爱好者一生中都应该至少来一次蒙特利尔国际爵士音乐节。
An episode of major depression may occur only once in a person's lifetime, but more often, it recurs throughout a person's life.
重度抑郁发作可能在一个人的一生中仅出现一次，但更经常的是，它在一个人的一生中反复出现。
In a normal water phase, rivers eventually empty into oceans, and once in the oceans, the Phosphorus gets absorbed by water plants like algae.
在正常水相下，河流最终流入海洋，而一旦进入海洋，磷就被藻类等水生植物吸收。
Once in the bloodstream, the bacteria adhere to the surface of the red cells.
细菌一进入血液里，就附着在红细胞表面上。
They are hoping that once in office he can be persuaded to moderate his views.
他们希望他一上台后就能他说服，使他的观点变得温和些。
Once in a while, I like to watch scary movies.
偶尔，我喜欢看恐怖电影。
Maybe to eat breakfast once in a while but never to herd cows and sheep!
也许偶尔会去吃一顿早餐，但是绝对不会去放牛羊！
Once in the program, you have to study for 7 to 12 years at school.
一旦加入这个项目，你必须在学校学习7到12年。
Once in the second grade, our teacher had each of us race across the monkey bar.
二年级的时候，老师让我们每个人比赛越过攀爬架。
We are now living in different cities, but we still talk on the phone once in a while.
我们现在住在不同的城市，但是仍然偶尔通通电话。
I still remember visiting a friend who'd lived here for five years and I was shocked when I learnt she hadn't cooked once in all that time.
我还记得，我去拜访一个在这里住了五年的朋友，当我得知这几年间她没有做过一次饭时，我很震惊。
I won't be able to visit you any more, but would it be too much to ask if you could come and visit me once in a while?
我不能再来看你了，但是如果这个要求不过分的话，你能偶尔来看看我吗？
Theatre tickets are so expensive that we only go to the theatre once in a while.
戏票很贵，所以我们只是偶尔去看一场戏。
This "once in a lifetime" event actually may take place twice in some folks' lives.
这种“生平仅见”的事件实际上有可能在一些人的生活中发生两次。
People get out of his way when he appears once in a twelve-month down here among us.
只要他一年一次在我们这儿出现，人们就会故意避开他。
Once in debt, neither the individual samurai nor the shogun himself found it easy to recover.
一旦负债，无论是武士本人还是幕府将军本人都很难恢复元气。
Every once in a while the instructor makes a witty remark, causing others in the class to laugh.
每隔一段时间，老师就会说一句诙谐的话，让班里的其他人都笑了起来。
I grunt once in a while, so he knows I'm awake, and then I tell him how great it was when it's over.
我偶尔咕哝一声，让他知道我醒了，然后我告诉他一切都结束了有多棒。
It must because of the sort of the thing we'd all love to do once in a while and never quite have the courage to.
它一定是因为一些我们偶尔都喜欢做但不是从来都有勇气去做的事。
We went on a camping trip once in Italy and my wife spent the whole time worrying about bats getting into her hair.
我们有次在意大利露营，我的妻子一直在担心蝙蝠飞到她的头发里。
We went on a campaign trip once in Italy, and my wife spent the whole time worrying about bats getting into her hair.
我们有次在意大利露营，我的妻子一直在担心蝙蝠飞到她的头发里。
Once in a while, I'll listen to the radio to see what they are putting out, but it's not too often I hear something I like.
偶尔，我会听听收音机，看看他们在播什么，但不常听到我喜欢的东西。
They can attend to several things at once in the mental scratch pad called working memory, an essential skill in this era of multitasking.
他们可以在大脑的“工作记忆”区同时处理几件事，这是这个多任务时代的一项基本技能。
I was once in a meeting where somebody not in the meeting sent an IM to the person sharing his desktop, that disparaged one of the other meeting participants.
我曾在参与的一个会议中看到，某个没有参会的人向共享桌面的人发送了一条即时信息，其中对某个参加会议的人有不敬之词。
Once in Kolkata, they sleep on the street or in their rickshaws or in a dera—a combination of garage and repair shop and dormitory managed by someone called a sardar.
一到加尔各答，他们就睡在大街上或是人力车里，或在由一个叫萨达尔的人管理的车库、修理店和宿舍的组合区域 dera 里。
To guarantee that the header is processed only once in a given source file, we start by testing the #ifndef.
为了保证头文件在给定的源文件中只处理过一次，我们首先检测 #ifndef。
About once in ten years snow falls on Mexico City.
墨西哥城大约每隔十年降一次雪。
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